Swab btjbbee foe oil wells



Dec. 10, 1929. w..G. BlsBE Patented Dec. 10, 1929 WALTER G. BISBEE ANDBEN 1 HOFFMALLOF BRISTOW, OKLAHOMA swAB RUBBER non on. WELLSAppli-cation led January 21, 1926. Serial No. 82,832.

The object of this invention is to provide a swab rubber or a packingelement of this class with suitablereinforcements properly spaced andpositioned so as not to enhance the natural packing tendency of therubber body, but which will at the same time prevent the collapse of thebody during the various operations for which such a structure isadapted. l

Another object resides in the construction of cap members for protectingthe entremities of the rubber and in constructing e2:- tremit-ies of thepacker body in such a way as to facilitate the positioning and retainingoi' the cap members in position and permitting the passage or fluid atpoints where same is essential.

Reference will be had to the accompanying drawings wherein likecharacters of reference designate the vcorresponding parts throughoutthe several views, in which,

Fig. l is a vertical sectional view showing the parts in position tobeassembled.

F ig. 2 is a perspective of the assembled structure showing thereinforcing elements in dotted line7 and Fig. 3 is a view of thereinforcing elements. The swab rubber body A is a cylindrical structureformed with a longitudinal passage which is enlarged centrally toproduce a chamber B. The upper and lower extremities of the body A aretapered as at C-D to form truncated cone portions designed 'for thereception of the caps E-F. The body of the swab is provided through outits structure with longitudinally extending reinforcing Astrips G ofsuitable material which, in the present illustration, extend from pointsadjacent the upper end to points adjacent the Y lower end. Thesereinforcing elements are of sufficient number and properly spaced toprovide the necessary resiliency in the body and at the same time retainthe same in th J normally desired extended position The reduced upperand lower portions of the central passageway are slotted as at b toprovide for the passage of fluid and the cap members E-F may besimilarly slotted as shown at e. The slots in the cap member E mayextend across the top of the latter as at E and as illustrated in thepresent structure. I

rlhe assembled device is shown clearly in Fig. 2, the caps E and F beingof suflicient width to extend a substantial distance along the inclined-faces of the truncated eXtremities of the body. By this arrangement theouter face or' the body A is free to engage the inner wall of the casingand to expand or contract sufficiently to enable the proper operation ofthe part.

What we claim as new and useful and desire to secure by Letters Patent,is

l. In a swab rubber, a resilient body member formed with a centralpassage, and caps enclosing the extremities of said body member lormedwith central openings adapted to register with the passage in saidmember, the passage in the body member being enlarged centrally and thereduced portions ofthe vpassage being slotted to acilitate the movementof the iuid therethrough.

2. In a swab rubber, a resilient body member and radially yieldable,reinforcing elements of liat stock bowed from end to end,

